So riding a roller coaster can potentially cause your lung to deflate like a balloon. Now that's a ride!
A subdural hematoma occurs when veins in your brain rupture for some reason (usually a head injury), resulting in blood pooling underneath your skull. The pressure created by the pooling blood can deform your brain.
A fluid leak sounds like a car problem and not a person problem. Ick.
Approximately four people die every year in the United States due to a roller coaster-related injury. Given the abject stupidity of a good portion of humanity, I honestly figured it would be worse than that.
: Presse Med. 2000 Feb 5;29(4):175-80. Neurological complications after roller coaster rides: an emerging new risk? Kettaneh A, Biousse V, Bousser MG. Service de Médecine interne, Hôpital Jean Verdier, Bondy.
METHODS: We report 6 cases of complications occurring after roller-coaster rides and analyze published data. RESULTS: Complications seen our patients included 5 cervicoencephalic arterial dissections, one with brainstem dysfunction due to extending syringobulbia. Reported data include one cervicoencephalic arterial dissection, one case of carotid artery occlusion, 3 cases of subdural hematoma, one with subarachnoid hemorrhage, one with cerebrospinal fluid leak, and one with Brown-Séquard syndrome secondary to an enterogenous cyst of the spinal cord.
I don't know what syringobulbia is, but I'm glad I don't have it.
As funny as these are, it's important to remember that rollercoasters are pretty safe and you're a lot more likely to die driving to a theme park.